Re: Grid Networking Reliance on DHCP

Over the last decade, I have never had or heard of a DHCP lease renewal failure causing a clusterware node failover. This seems like a pretty specific problem with your DNS.

Regardless, is there a reason you are not using what I have found to be the easiest to implement and manage, least error prone, and most scalable option - GNS?

Seth

On Thu, Sep 8, 2016 at 4:15 PM, <fmhabash_at_gmail.com> wrote:

> True, but if they are left under the control of DHCP, I have seen issues
> when dhclient attempts to renew the lease on these IPs and it fails for
> some reason. As s result, the VIPs are gone and a failover is triggered.
>
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>
> This can be resolved either by configuring these IPs to never expire or
> remove DHCP altogether. In such case, I’m thinking the virtual interfaces
> need to be configured with BOOTPROTO="static"
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> Feedback appreciated.
>
>
> ----------------------------------------
> Thank you
>
>
>
> *From: *Seth Miller <sethmiller.sm_at_gmail.com>
> *Sent: *Thursday, September 8, 2016 5:02 PM
> *To: *fmhabash_at_gmail.com
> *Cc: *'oracle-l_at_freelists.org' (oracle-l_at_freelists.org)
> <oracle-l_at_freelists.org>
> *Subject: *Re: Grid Networking Reliance on DHCP
>
>
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> The VIPs are created and managed by clusterware. You shouldn't need a
> configuration file at all for them.
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>
> Seth
>
>
>
> On Thu, Sep 8, 2016 at 3:54 PM, <fmhabash_at_gmail.com> wrote:
>
> I know there are 3 options to configure the public network for a GI
> cluster. GNS, DHCP, or static. I have, typically, did a static IP’ing for
> public & VIPs.
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>
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> However, Oracle official documentation indicated that as of 11.2, DHCP can
> by used for all VIPs, but not public IP.
>
>
>
> SO, the physical interface eth0 and its virtual eth0:1 all have
> ‘BOOTPROTO="static"’.
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>
> If you are not using GNS, how are having your IP’s setup for an 11.2 GI
> cluster.
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>
> ----------------------------------------
> Thank you
>
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